/*
You'll need NodeJS installed to run this script.

Place this script in your track's root folder:

    track/
      + config.json
      + json2csv.js     <-----
      + exercises/
        + hello_world
        + bob
        + ...

Simply run the command:

    $ node json2csv.js
    
You'll get a file named `core.csv` in the same folder.
*/

const fs = require('fs');

// read `config.json` file
const jsonContent = fs.readFileSync('./config.json');
// get the array of exercises
const exercises = JSON.parse(jsonContent.toString()).exercises;

// create the header and generate a line by each exercise
const header = 'Slug,Core,Unlocked by';
const csvLines = exercises.map(exercise => `${exercise.slug},${exercise.core},${exercise.unlocked_by}`);

// write a CSV file named `core.csv`, easy to import on a spreadsheet
const csvContent = [header].concat(csvLines).join('\n');
fs.writeFileSync('core.csv', csvContent);